CBSE Questions for Class 11 Medical Biology Transport In Plants Quiz 1 - MCQExams.com

Lenticles are involved in
  • Photosynthesis.
  • Transpiration.
  • Gaseous exchange.
  • Food transport.
Swelling in wooden block placed in water is due to
  • Endosmosis
  • Capillarity
  • Absorption
  • Imbibition
Which of the following statement is correct?
  • Osmotic pressure of solution is greater than pure solvent.
  • Osmotic pressure of solution is lower than the pure water.
  • Osmotic pressure of solution is equal.
  • None of the above
Process of osmosis shall cease when
  • Solution become isotonic
  • Water concentration becomes equal
  • There is no light
  • The level of water falls
Hydathodes are also called
  • Water stomata
  • Sunken stomata
  • Guard cell
  • Subsidiary cell
What does a plant cell show if placed in sea water?
  • Plasmolysis
  • Reverse osmosis
  • Deplasmolysis
  • Diffusion
Guttation is the result of
  • Diffusion
  • Transpiration
  • Osmosis
  • Root pressure
The process responsible for facilitating loss of water in liquid form the tip of grass blades at night and in early morning is
  • Root pressure
  • Imbibition
  • Plasmolysis
  • Transpiration
Transpiration and root pressure cause water to rise in plants by
  • Pushing it upward
  • Pushing and pulling it respectively
  • Pulling it upward
  • Pulling and pushing it respectively
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out of the above statements using one of the following options.
  • Both processes can not happen simultaneously.
  • Both processes can happen together because the diffusion coefficient of water and $$CO_2$$ is different.
  • The above processes can only happen during night time.
  • One process happen during day time and other at night.
The process of the escape of liquid from the tip of uninjured leaf is called as
  • Evaporation
  • Transpiration
  • Guttation
  • None of the above
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  • Assertion is correct but Reason is incorrect.
  • Both Assertion and Reason are incorrect.
In the process of osmosis in the cell __________________.
  • Both cell wall and protoplasm will act as a membrane
  • Entire protoplast act as a membrane
  • Only outermost layer of protoplasm act as a membrane
  • Only cell wall act as a membrane
What is correct about the movement of substance across the membrane in facilitated diffusion?
  • It is an active transport.
  • It doesn't cause transport of molecules from lower concentration to higher
  • it does not require a carrier protein
  • It works against concentration gradient
In rainy season, the doors get wet due to
  • Imbibition
  • Absorption
  • Diffusion
  • Endosmosis
Which one of the following is not related to guttation?
  • Water is given out in the form of droplets
  • Water given out is impure
  • Water is given out early morning
  • Guttation is of universal occurrence
In the process of plasmolysis
  • Endosmosis occurs
  • Exosmosis occurs
  • Imbibition occurs
  • Diffusion occurs
Which of the following is not a controlled process?
  • Transpiration
  • Guttation
  • Both A and B
  • None of the above
Solute potential of a solution is always
  • $$=0$$
  • > 0
  • < 0
  • Between 0 to 1
Due to plasmoysis, the plant cell
  • Bursts
  • Swells up
  • Become turgid
  • Become flaccid
The $$\Psi w$$ of pure water is 
  • Minimum
  • Less than DPD
  • Maximum
  • Variable
Product of sexual reproduction generally generates : 
  • Longer viability of seeds
  • Prolonged dormancy
  • New genetic combination leading to variation
  • Large biomass
Apoplast movement of water occurs 
  • Through cell wall
  • Through plasma membrane
  • Through cytoplasm
  • Through middle lamella only
Guttation is common among the plants of $$..........$$ climate.
  • Hot and wet
  • Hot and windy
  • Cold and humid
  • Cold and windy
What are the types of osmosis?
  • Endosmosis
  • Exosmosis
  • Both A and B
  • None of these
The movement of soluble products through the vascular tissue of plants is called:
  • Transpiration
  • Translocation
  • Transcription
  • Transduction
Which of the following is not a type of transpiration?
  • Stomatal transpiration
  • Cuticular transpiration
  • Lenticular transpiration
  • Endodermal transpiration
The shrinking of protoplasm in a plant cell,  is called as
  • Plasmolysis
  • Deplasmolysis
  • Flaccidity
  • Turgidity
The presence of fluid on the edges of leaves in early morning is due to
  • Transpiration
  • Guttation
  • Exudation of water
  • Condensation of moisture
When water moves through a semipermeable membrane, which of the following is created?
  • OP
  • SP
  • TP
  • WP
The process in plants that releases water into the atmosphere is known as  
  • Run-off.
  • Condensation.
  • Precipitation.
  • Evaporation.
  • Transpiration.
Guttation occurs by
  • Stomata.
  • Lenticels.
  • Hydathodes.
  • Wounds.
Osmosis is the movement of substances which takes place along the gradient.
  • True
  • False
Water potential of a solution is depicted by 
  • $$ \psi_p $$
  • $$ \psi_w $$
  • $$ \psi_x $$
  • $$ \triangle \psi $$
The process responsible for the movement of water molecules in a solution having different concentrations of solute is
  • Facilitated transport
  • Osmosis
  • Phagocytosis
  • Active transport
  • Exocytosis
Swelling of wooden frames during rains is caused by
  • Endomosis
  • Imbibition
  • Capillarity
  • Osmosis
By which of the following mechanisms is glucose reabsorbed from the glomerular filtrate by the kidney tubule?
  • Osmosis
  • Diffusion
  • Active transport
  • All of the above
Stomata perform the function of
  • Gaseous exchange
  • Oxygen evolution
  • Carbon dioxide evolution
  • $$CO_2$$ absorption.
The movement of water molecules into and out of the cells takes place by:
  • Carrier proteins
  • Symport systems
  • Ion channels
  • Osmosis
  • Active transport
Adding solute to pure water will cause development of 
  • Positive water potential
  • More positive water potential
  • More negative water potential
  • Negative water potential
Guttation is the process of elimination of water from plants through 
  • Stomata
  • Hydathodes
  • Lenticels
  • Wounds
In plasmolysis, a plant cell 
  • Swells up
  • Bursts
  • Becomes flaccid
  • Becomes turgid
Diffusion of water through a semipermeable membrane is called imbibition.
  • True
  • False
Osmosis is defined as
  • Flow of solvent (water) through a semipermeable membrane from less concentration solution to more concentrated solution.
  • Flow of solute from a semipermeable membrane.
  • Flow of water without a membrane.
  • None of the above
Hydathodes occur on 
  • Stem
  • Leaves
  • Roots
  • All the above
Simultaneous movement of two molecules across a membrane in the same direction is known as
  • Antiport
  • Uniport
  • Symport
  • None of the above
Osmosis involves
  • Diffusion of suspended particles from higher to lower concentration.
  • Diffusion of suspended particles from lower to higher concentration.
  • Diffusion of water from more to less concentrated side.
  • Diffusion of water from less to more concentrated side.
In root apoplast path of water transport; the water is transported through
  • Cell wall only
  • Cell wall and inter cellular spaces
  • Intercellular spaces
  • Intercellular spaces, cell walls and endodermis.
Correct pathway of water movement in plant roots is
  • Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Xylem $$\longrightarrow$$ Pericycle
  • Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Pericycle $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Xylem
  • Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Pericycle$$\longrightarrow$$ Xylem
  • Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Pericycle $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Xylem
The initial stage of water absorption by root cells is:
  • Absorption
  • Diffusion
  • Osmosis
  • Imbibition
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